苯并三唑-N-Mannich碱与酮的交换反应

用苯并三唑、甲醛与芳香胺生成的N-Mannich碱,分别与苯乙酮、苯丙酮、β-苯乙酮、α-四氢萘酮进行交换反应,取得了成功。共合成了15个β-芳氨基酮,其中3个为未知物,交换反应在HCl-EtOH存在下于室温进行,具有反应条件温和、方法简便、产率尚可的特点。     

3-苯胺甲基-5-(1’-H-苯并三唑-1’-甲撑)-1,3,4-噁二唑-2-硫酮的合成

1 -H -苯并三唑 - 1-乙酰肼在CS2 /KOH作用下环化得到 5- ( 1‘ -H -苯并三唑 - 1‘ -甲撑 ) - 1,3,4 -口恶二唑 - 2 -硫酮 ,经Mannich反应合成得到标题化合物 3-苯胺甲基 - 5- ( 1’ -H-苯并三唑 - 1’ -甲撑 ) - 1,3,4 -恶二唑 - 2 -硫酮     

硬脂酰苯并三唑的合成及其反应活性

采用二环己基碳二亚胺缩合法由硬脂酸和苯并三唑合成了硬脂酰苯并三唑,产率85%,并利用FT-IR和1HNMR对产物进行了表征;硬脂酰苯并三唑在胰岛素的化学修饰中呈现较高的酰化反应活性及选择性,并进一步证实该酰化苯并三唑的合成是成功的.     

双苯并三唑N-Mannich碱的合成及应用

苯并三唑、乙二醛和一系列胺在室温下发生 Mannich反应合成五种双苯并三唑N-Mannich碱,此类有机物在荧光分析及有机合成中的都有应用.     

含二茂铁基及苯并三唑类的酰腙化合物的合成

以１Ｈ－苯并三唑１－１乙酰肼与甲酰基二茂铁，乙酰基二茂铁，１，１＇－双乙酰基二茂铁缩合得到了３个二茂铁亚甲基－１Ｈ－苯并三唑乙酰腙，并通过元素分析，ＩＲ，＾１ＨＮＭＲ，＾１３ＣＮＭＲ等进行了表征。     

3-苯胺甲基-5-(1''''-H-苯并三唑-1''''-甲撑) -1,3,4- 二唑-2-硫酮的合成

1－H－苯并三唑－1－乙酰肼在CS2／KOH作用下环化得到5－（1′－H－苯并三唑－1′－甲撑）－1,3,4－恶二唑－2－硫酮,经Mannich反应合成得到标题化合物3－苯胺甲基－5－（1′－H－苯并三唑－1′－甲撑）－1,3,4－恶二唑－2－硫酮。     

新化合物1-(4,4''-二甲氧基二苯基)-亚甲基-3,6-二甲氧基环丙萘的合成和光谱性质

报导了一种新化合物1—(4，4’—二甲氧基二苯基)—亚甲基—3，6—二甲氧基环丙萘(简称DHBM)的合成，测定了该化合物的质谱、紫外光谱、红外光谱、^1H和^13C的核磁共振谱，并进行了表征，该化合物中与萘稠合的三元环，引入苯亚甲基后，呈现出更高的稳定性。     

利用相转移催化法合成乙酰氧基甲基-七甲基环四硅氧烷

探讨了利用相转移催化法由八甲基环四硅氧烷合成乙酰氧基甲基—七甲基环四硅氧烷的方法．从催化剂的选择，反应时间，反应温度，原料比，溶剂的选择等方面对该反应可能的最佳条件进行了初步探讨．实验证明以四丁基硫酸氢铵为相转移催化剂，水为溶剂，用—氟甲基—七甲基环四硅氧烷与醋酸钾反应，可以在温和的条件下制备乙酰氧基甲基—七甲基环四硅氧烷、反应条件：—氟甲基—七甲基环四硅氧烷与醋酸钾的摩尔投料比1：1．3，60℃回流1．5h较为适宜．     

5，6－并－15－冠－5－1－羟基苯并三唑的合成

报道了一种新化物５，６－并－１５－冠－５－１－羟基苯并三唑的合成及结构鉴定。     

催化胺化法合成2,2,6,6—四甲基—4—哌啶胺

本文是善于,２,６,６－四甲基－４哌啶酮催化胺化合成胺阻胺光稳定剂中间体２,２,６,６,四甲基－４－哌啶胺的研究。文中选用２骨架镍催化剂,系统地研究了反应温度、压力、时间、原料摩尔比、原料纯度等对反应的影响,在最佳条件下,２,２,６,６－四甲基－４－哌啶胺产率可达９４．５％,实际收率８２％。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

英文诗歌中的喻类修辞

为了有助于提高英文爱好者的个人情操、文化素养和学习兴趣,以及专业人员对英语学习和研究进行多途径的探索,本文通过一些精选诗歌的引证和分析,着重论述了喻类修辞法在英文诗歌中的运用其及效果。     

Man Is Unable to Change the Miserable Life——Analysis of the Arrangement of Four Characters in The Glass Menagerie

Tennessee Williams is considered as one of the most important American playwrights since World War II.The Glass Menagerie is his first successful drama,which describes a tragic situation of family and means to say that Man is unable to change the miserable life,no matter whatever means he try,This essay focuses on the analysis of the arrangement of the four main characters:Laura.Amanda,Jim and Tom to reveal the theme.Laura is fragile.Amanda is brave.Jim is vital.Tom is sensible.And all of them develop and try the different means to struggle against life,but fail tragically.With the evidence,the paper comes to conclusion naturally that Man is unable to change the miserable life,and he dooms to fail.     

Characterization of root-nodulating bacteria on Retama raetam in arid Tunisian soils

The aim of this study is to investigate the diversity of Retama raetam root-nodule bacteria isolated from arid regions of Tunisia. Twelve isolates, chosen as representative for different 16S rRNA gene patterns, were characterized by 16S rRNA gene sequencing and phenotypic analysis. Isolates were assigned to Sinorhizobium, Rhizobium and Agrobacterium. Symbiotic properties of Sinorhizobium and Rhizobium isolates showed a large diversity in their capacity to infect their host plant and fix atmospheric nitrogen. Strain RK 22 identified as Rhizobium was the most effective isolate.     

Features of Women''s language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Affordable Accurate Evaluation of the Binding Conformations Predicted by Molecular Docking Studies in Bio-System

正Recently,docking has been widely used to predict the binding-modes of protein-inhibitors,when the crystal complexes structure was absent.Most docking algorithms are able to generate a large number of probable conformations,it,however,is difficult to effectively evaluate these docking poses and identify the most reasonable bindingmode.In the present study,on the basis of the crystallographic data of human 3-hydroxy-3-methylglutaryl coenzyme